Linear Stability Analysis Using the Arnoldi Eigenmode Extraction Technique Applied to Separated Nozzle Flow
Paper i proceeding, 2013

A linear stability analysis method, employing a linearized flow solver combined with the Arnoldi algorithm for eigenmode approximation, was applied to a separated supersonic flow inside an axially symmetric convergent-divergent nozzle. The eigenmodes were analyzed in terms of frequency, structure and damping. For the case demonstrated, four different types of axial modes and four different types of tangential modes were identified. Results show that the least damped axial modes displayed a relatively low frequency range, 60 Hz to 300 Hz. These modes showed a movement of the shock pattern inside the nozzle. The other mode types exhibited higher frequencies, strong shear layer interactions and acoustic waves. Additionally, the method revealed the presence of a continuous spectrum in the nozzle flow field.

Författare

Ragnar Larusson

Chalmers, Tillämpad mekanik, Strömningslära

Niklas Andersson

Chalmers, Tillämpad mekanik, Strömningslära

Jan Östlund

GKN Aerospace Sweden

Lars-Erik Eriksson

Chalmers, Tillämpad mekanik, Strömningslära

49TH AIAA/ASME/SAE/ASEE JOINT PROPULSION CONFERENCE, July 14 - 17, 2013. San Jose, CA, USA

Vol. 1 Part F AIAA 2013-3642

9th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, JPC 2013
San Jose, USA,

Ämneskategorier

Rymd- och flygteknik

Strömningsmekanik och akustik

DOI

10.2514/6.2013-3642

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Senast uppdaterat

2021-05-03